126741649 has 2 divisors, whose sum is σ = 126741650. Its totient is φ = 126741648.

The previous prime is 126741611. The next prime is 126741691. The reversal of 126741649 is 946147621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98863249 + 27878400 = 9943^2 + 5280^2 .

It is a cyclic number.

It is not a de Polignac number, because 126741649 - 2²³ = 118353041 is a prime.

It is not a weakly prime, because it can be changed into another prime (126241649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63370824 + 63370825.

It is an arithmetic number, because the mean of its divisors is an integer number (63370825).

Almost surely, 2^126741649 is an apocalyptic number.

It is an amenable number.

126741649 is a deficient number, since it is larger than the sum of its proper divisors (1).

126741649 is an equidigital number, since it uses as much as digits as its factorization.

126741649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 126741649 is about 11257.9593621580. The cubic root of 126741649 is about 502.3114961704.

The spelling of 126741649 in words is "one hundred twenty-six million, seven hundred forty-one thousand, six hundred forty-nine".